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stevej37 12-14-2025 09:20 AM
^^^ I might do that if the additives don't smooth it out.
I don't want to do a carb switch during the snow season....it might not go good and my shovel is not fun. :)

Alan A 12-14-2025 09:24 AM
Took 20 minutes on my backpack blower.

Fired up first pull. $20 and 20 minutes to fix a $500 blower worked for me. I loathe messing with carbs - they are like black magic afaict.

gl.

cabmandone 12-14-2025 09:24 AM
Quote:
Originally Posted by stevej37 (Post 12578234)
^^^ I might do that if the additives don't smooth it out.
I don't want to do a carb switch during the snow season....it might not go good and my shovel is not fun. :)
Worst case is back on with the old carb. I can't see a down side to a job that takes maybe 20 minutes.

stevej37 12-14-2025 09:31 AM
^^^ 20 minutes...if nothing goes wrong.:)

I thought you would suggest getting this....

<iframe width="500" height="576" src="https://www.youtube.com/embed/g9iHJeSqe_0" title="Snow Rhino is getting it done in the Midwest! #snowremovalequipment #snowremovalblade #lawnmowing" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>

cabmandone 12-14-2025 09:44 AM
Nah. If I suggest something it'll be something with a cab and heat!

stevej37 12-14-2025 11:06 AM
This guy shows an easy fix....I can do that.

<iframe width="560" height="315" src="https://www.youtube.com/embed/tfWNXsH2CVo?si=qXmprA8d6aNjy0u8" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>

Bill Verburg 12-14-2025 11:55 AM
Quote:
Originally Posted by stevej37 (Post 12578225)
Just finished doing the drive....started good but had to let it warm up more because of the low temp. After about 3 minutes at a med idle, I opened it up and it surged, but not as bad. That was after adding a quart of TrueFuel.

After a couple minutes of surging...it leveled out. I'll add the Techron on Tues. and see how it goes next usage.
back in the day, Techron was the go to fuel system cleaner

surge usually indicates a lean mixture, which makes sense if the jets are gummed up

I just use non-ethanol pump fuel in mine, main benefit is little to no water absorption which is the main issue w/ ethanol fuel

stevej37 12-14-2025 12:34 PM
^^^ Yeah...I've resisted using rec fuel because it's not readily sold at most stations here.
I'm going to start using it though....also it's 90 octane here instead of our 87 regular.

Cajundaddy 12-14-2025 01:47 PM
Fresh Top Tier premium fuel for the season and run it nice and hot. After use turn off the gas petcock and let it run til the carb bowl is dry and she dies. I do this with all small carbureted engines to avoid shellacking the carb jets and float bowl. Ethanol blend is evil.

stevej37 12-14-2025 01:55 PM
^^^ I don't see any 'gas shutoff' on my Tecumseh. I could drain the bowl, but the plastic cover that includes the ign switch, throttle and primer have to come off first. Could be done.

stevej37 12-14-2025 05:15 PM
I like this one.

<iframe width="500" height="576" src="https://www.youtube.com/embed/MwgM3UXQf9c" title="Introducing Yarbo Snow Blower Robot #snowblower #gardeningtools #snow" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>

flipper35 12-14-2025 07:13 PM
Mine was surging, needed a new spark plug at 17 years old. (already had a new carb, only run straight gas in it, always use Stabil for summer storage)

stevej37 12-14-2025 07:34 PM
^^^ Going to switch to rec gas....not easy to find/buy it here.

flatbutt 12-14-2025 07:43 PM
Quote:
Originally Posted by Scott Douglas (Post 12578204)
When I was growing up we had a Pontiac wagon that Dad used to pull our camping trailer. It had 10.5:1 CR and three 2-bbl carbs and would only run correctly on Chevron Custom Supreme that at that time had an octane rating of 101.
To blow the carbon out of it when it started pinging, we'd fill an orange juice can full of water and pour it down the middle carb while holding the throttle open at about 2-3k rpm. Carbon chunks would come out of the exhausts. It always ran better after doing that.
I try to run Chevron gas in our cars because it has Techron in it from the pump. So far all's good, and my V-6 has 10:1 CR.
I don't think you're going to get a cleaned piston like those videos start with, with the application of only one can.
My Dad used to do that too. The cloud of steam was mighty impressive.

911 Rod 12-15-2025 09:15 AM
Did you put fuel stabilizer in before you put it away for the summer?

cabmandone 12-15-2025 09:15 AM
Something about that video where the guy drills the jet doesn't make sense to me. He says it's the air jet. That doesn't seem right. Adding more air doesn't seem like it would fix the problem when he says applying the choke smooths the engine out. By adjusting the choke he's cutting air and changing the mixture. That has to be a fuel jet he's making larger.

Cajundaddy 12-15-2025 09:40 AM
Quote:
Originally Posted by stevej37 (Post 12578335)
^^^ I don't see any 'gas shutoff' on my Tecumseh. I could drain the bowl, but the plastic cover that includes the ign switch, throttle and primer have to come off first. Could be done.
Should be easy enough to add a shutoff to the fuel line between tank and carb just like a motorcycle. Running the carb dry is the secret sauce with ethanol blend gas these days.
I did that every day after mowing the lawn with my Honda mower and it kept all the carb jets clean.

matthewb0051 12-15-2025 10:10 AM
Quote:
Originally Posted by Arizona_928 (Post 12578088)
Seafoam but it'll need to be pulled for a cleaning.

Probably can buy a Chinese carb for 15 bucks.... I always add a shut off valve on stuff like this so it drains the bowl on the last start up of the season.
I tried the Chinese carb for my lawnmower. It leaked like a MF.

I had similar issue living in Hawaii. Ethanol gas just sucks in moisture to the carbs. A guy that worked for me had an airplane with air cooled engine. He had to replace an entire cylinder and barrel for his engine due to the E Gas. Our solution was getting marine gas down where the SS Minnow set sail on a 3 hour cruise.

Ah Marianne...

stevej37 12-15-2025 10:49 AM
Quote:
Originally Posted by 911 Rod (Post 12578751)
Did you put fuel stabilizer in before you put it away for the summer?

No...I did not. It started right up a few weeks back after sitting all summer...no problem.
The surging was a little more pronounced this season...that's my problem. I'm going to switch to rec gas, so that should keep it from getting worse yet. If not, I start with the carb.

stevej37 12-15-2025 11:01 AM
Quote:
Originally Posted by Cajundaddy (Post 12578765)
Should be easy enough to add a shutoff to the fuel line between tank and carb just like a motorcycle. Running the carb dry is the secret sauce with ethanol blend gas these days.
I did that every day after mowing the lawn with my Honda mower and it kept all the carb jets clean.

I'll look at that this spring. The 5hp Honda engine on my Trac Vac has a shut-off....wonder why it isn't on a 8hp Tecumseh.


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